# LimeSDR quick test fail after temp increases, hopefully board is actually OK?

**URL:** <https://discourse.myriadrf.org/t/limesdr-quick-test-fail-after-temp-increases-hopefully-board-is-actually-ok/6050>\
**Category:** LimeSDR\
**Created:** [3 May 2020 02:18 UTC](https://discourse.myriadrf.org/t/limesdr-quick-test-fail-after-temp-increases-hopefully-board-is-actually-ok/6050 "2020-05-03T02:18:06Z")\
**Posts on this page:** 1\
**Showing post:** 6

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**Author:** ![andrewback](https://avatars.discourse-cdn.com/v4/letter/a/22d042/32.png) [@andrewback](https://discourse.myriadrf.org/u/andrewback)\
**Post date:** [4 May 2020 12:40 UTC](https://discourse.myriadrf.org/t/limesdr-quick-test-fail-after-temp-increases-hopefully-board-is-actually-ok/6050/6 "2020-05-04T12:40:05Z")

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As suggested by others the self-test should only ever be run when the board is cold, with nothing attached to the RF ports and probably ideally not fitted in a case — impossible to say how pressure on the board and adjacent metalwork etc. might affect results.

Also, hopefully it’s a one off, but we haven’t tested the Hacker Gadgets cases and obviously cannot vouch for third party products anyway, but it is possible that thermal coupling may not be great and if so, this might not help either.

> [@Tetra A case for LimeSDR-A : JUNK!](https://discourse.myriadrf.org/t/tetra-a-case-for-limesdr-a-junk/6031):
>
> I received a Lime SDR Type-A and Tetra A case to “protect” it. The case claims to be CNC made but does not resemble that type of quality at all. The holes for the sma connectors were way oversize and the provided connectors spun even though the case had flat spots. Due to the instructions to tangle and fold the all identically sized pigtails causes the lime to fail the self test due to poor signal quality. I had -21 dbm fail on one of the last freq checks. (I have a somewhat related photo inclu…

Although you note that it does seem to be keeping the temperature down, which is good, and the other report regarding the case will hopefully be a one-off QC issue.

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